Fluid circulating apparatus for knitting machines and the like



2,354,188 FLUID CIRCULATING APPARATUS 'FOR KNITTING MACHINES AND THE LIKE Judy 2.5, 1944 c. s. ASCHENBRENNER 6 Sheets-Sheet 1 Filed Jan. 2, 1941 INVENTQR:

mar/a? 51 A. sahenmm-mr y 1944. c. s. ASCHENBRENNER 2,354,138

FLUID CIRCULATING APPARATUS FOR KNITTING MACHINES AND.THE LIKE 'Filed Jan. 2, 1941 6 Sheets-Sheet 2 CIZS P125 INVENTORI flarlesilsckerfimmwx;

y 1944- c. s. ASCHENBRENNER FLUID CIRCULATING APPARATUS FOR KNITTING MACHINES AND THE LIKE Filed Jan. 2, 1941 6 Sheets-Sheet 3 NVE NTO R: Ckarlas SY/Is'ch/enbrenner BY W HATTO EY.

y 1944. c. s. ASCHENBRENNER 2,354,183

, FLUID CIRCULATING APPARATUS FOR KNITTING MACHINES AND THE LIKE Filed Jan. 2, 1941 6 Sheets-Sheet 4 FiE-Q7- INVENTOR: Ex N [[1 (ladies .i/Iethenbrmna;

y 5, 1944. c. s. ASCHENBRENNER 2,354,158

'FLUID CIRCULATING APPARATUS FOR KNITTING MACHINES AND THE LIKE Filed Jan. 2, 1941 6 Sheets-Sheet I N v E NTOR 1%? Charles S/lls'aezzbrenher,

ATTORN y 5, 1944. c. s. ASCHENBRENNER 2,354,138

FLUID CIRCULATING APPARATUS FOR KNITTING MACHINES AND THE LiKE Filed Jan. 2, 1941 6 Sheets-Sheet 6 m FlE- lq INVENTOR; (Z/arias SASchenbrmr BY wig 29%;- Q 4 I ATTORN Patented July 25, 1 944 FLUID CIRCULAIING APPARATUS FOR KNITTING MACHINES AND THE LIKE Charles S. Aschenbrenncr, Temple, Pa., assignor to Textile Machine Works, Wyomissing, Pa., a corporation of Pennsylvania Application January 2, 1941, Serial No. 372,729

19 Claims. (01. 66-126) "I'his variation in the length of the carrier stroke is generally provided for by an arrangement including a carrier rod actuator or friction box in frictional engagement with a reciprocating member known as a friction rod. The frictional engagement between these two members is initially set to prevent slippage between the box and rod during the normal traverse of the carrier,

and permits the rod to slide relative to the box after the travel of the associated carrier is stopped upon engagement with a stop member. However, when'the carrier rod reaches the end of its stroke and the friction rod continues its movement, the repeated slippage of the rod through the friction box, at regular intervals during uninterrupted operation of the machine, and more particularly when knitting with short stroke carriers as when splicing, or during fashioning when the travel of the carriers is progressively shortened while the travel of the friction rod remains unchanged, heats and in turn expands these members to such an extent that the binding action between the friction box and rod frequently becomes so intense as to adversely affect the operating e illciency thereof.

To dissipate the heat generated by friction and to keep the friction rod and box of a run-mam ioned knitting machine at a uniform tempera- When it is desired to warm a reciprocating member instead of to cool it, it is necessary only to substitute a relatively warm liquid for a relatively cool one in the temperature modifying means of the invention.

The reciprocating movement of knitting machine friction rods has, however, presented an obstacle to the smooth operation of such prior art cooling devices heretofore used to circulate fluid therethrough, such obstacle more particularly arising by reason of the high peak loads placed on the device at certain points in its operative cycle. For example, when the hollow reciprocating rod travels in the same direction as the liquid being pumped therethrough, the load on the liquid circulating motor isnegligible, but when the rod reverses its travel so as to move in a direction opposite to the flow of the liquid,

'the rod instead of helping to circulate the fluid It is an object of this invention to provide novel means for circulating fluid through a hollow reciprocating machine member which overcomes the referred to and other objectionable features of prior art devices.

ture and thereby keep it in proper operating condition at all times, it has heretofore been suggested to apply a cooling or a temperature control medium to the interior of the friction rod,

as disclosed in the C. F. Meyer Patents Nos. 1,971,316 and 2.018.460 dated August 21, 1934, and October 22, 1935, respectively.

While, for the reasons hereinabove stated, it is generally des red to cool the friction box rod of a full-fashioned knitting machine, it is evident that, in cold weather, the lubricant on the rod and the friction leathers commonly used for transmitting the motion of the rod to the friction box may become sotstiff as to cause an undue wear on the leathers for a time after starting up if the friction boxes were immediately engaged with the friction box rod. Under such conditions it will become apparent from the following descript on that the method and means according to my invention may be used to warm the friction rod of a knitting machine, or other reciprocating member, instead of cooling it.

Another object of my invention is to provide a novel method and means for circulating fluid through a hollow reciprocating rod of the referred to type.

Another object is to provide a. new method of circulating fluid through a closed circuit which involves the utilization of a hollow reciprocating machine member in said circuit as the means for inducing the flow of fluid therethrough during the movement of said member. Another object is to provide fluid flow means or means whereby a fluid may be moved along with a reciprocating member in a closed circuit to induce flow of fluid through said circuit without the use of a'motor or other special fluid flow means.

A further object is to provide automatic means for circulating fluid through a reciprocating rod of a full-fashioned knitting machine in which the motion of said rod is utilized to induce flow of the fluid through said rod.

A still further object is to provide novel means for maintaining the flow capacity of a flexing hose uniform during its cooperative movement improvements shown in the accompanying drawings, my invention resides in a fluid circulating system embodying the novel elements, features of construction and arrangement of parts in cooperative relationship, and the method of circulating fluid as effected by this device, as hereinafter more particularly pointed out in the claims.

In the drawings:

Figure 1 is a rear elevational view showing portions of a multi-section full-fashioned knitting machine having applied thereto one practical embodiment of my invention;

Fig. 2 is a detail view, partially in section, of part of the mechanism shown in Fig. 1;

Fig. 3 is an enlarged sectional view taken substantially along the line 33 of Fig. 1;

Fig. 4 is an enlarged sectional view taken substantially along the line 4-4 of Fig. 1;

Figs. 5 and 6 are schematic illustrations, shown in section, depictingprogressive steps in the operation of the fluid circulating system of my invention;

Fig. 7 is an elevational view of a modification of the invention and of a portion of a knitting machine with which it is adapted to cooperate;

Fig. 8 is a sectional view taken substantially along the line 8-4 of Fig. '7;

Fig. 9 is an elevational view of a modified form of reservoir having a fluid level gauge embodied therein;

Fig. 10 is a sectional view of the reservoir shown in Fig. 9;

Fig. 11 is a view, similar to Fig. 8, of a modifled form of reservoir;

Fig. 12 is a sectional view of one of the flexible conduits shown in Fig. '7;

Fig. 13 is a sectional view of one of the check valves of Fig. '7; and b Figs. 14 to 18, inclusive, are a series of diagrammatic views of a fluid circulating system in accordance with the present invention, showing the sequential positions of different parts at different steps in its operative cycle.

In the drawings and description, only the means and method necessary to complete understanding of the invention have been specifically set forth; further information as to the construction and operation of other related, usual and well known knitting machine elements. mechanisms, etc., may be found in one or more of the following publications:

1. Pamphlet entitled--Full-Fashioned Knitting Machines-published and copyrighted by the Textile Machine Works, Reading, Pennsylvania, in 1920.

2. Three catalogs entitled'I'he "Reading Full- Fashioned Knitting Machine Parts Catalog-published and copyrighted by the Textile Machine Works, in 1929, 1935 and 1940, respectively.

3. Booklet entitled-The Reading" high-Production Full-Fashioned Knitting Machinewhich forms a supplement to the above noted 1940 Parts Catalog of theTextile Machine Works, and which Booklet is a publication of the Textile Machine Works, and was copyrighted by the latter in 1940.

4. Pamphlet entitled-Knitting Machine Lectures-published by the Wyomissing Polytechnic Institute, Wyomissing, Pennsylvania, in 1935.

thefriction box rod of a straight knitting machine, a member which it is generally desired to cool in use. However, the application of my invention is not limited to cooling or to the knitting arts as it may be employed in connection with any reciprocating machine member which it is desired to warm or to cool.

A full-fashioned knitting machine of the multi-section type to which the present invention is particularly adaptable, generally comprises a series of spaced upright frame members I0, Figs. 1 and 4, which support a plurality of parallel horizontal frame members including front beam I2, back beam I3, front bed I4 and center bed I5. These upright and horizontal frame members effect a framework structure upon which the operative mechanisms of the machine, including a friction rod I 6, a back narrowing shaft IT, a back catch bar shaft I8, and camshaft I9, are operatively supported.

A rocker arm 20 which is pivotally mounted in a bearing 22 supported by the back beam I3, forms a part of the usual coulier mechanism (not shown) which receives its motion from the camshaft I9 in well known manner. The oscillating movement of the rocker arm 20 is utilized to reciprocate a friction rod I6 and a connecting bar 25, by means of a bracket 21 to which the upper or free end of the rocker arm 20 is connected through a link 28. The bracket 21 is rigidly fastened to the connecting bar 26 and is connected to the friction rod I6 through a crosshead 29. Fixed to the connecting bar 26 at equally spaced intervals are a series of slur cam boxes 30, one box being provided for each knitting section of the machine. These boxes are guided for reciprocation on a guide bar 32, supported by the center bed I5, and actuate jacks 34 of jack beds 35 to forwardly impel sinkers 30 which are slidably mounted and operate in sinker head 38 in the usual manner. Yarn carriers 40 which are carried by carrier rods 42, in turn mounted for free reciprocation in carrier brackets 43 secured to the center bed I5, are used to feed yarn to the loop forming mechanism of the positioning of the end stops between which the body yarn carrier rods reciprocate.

Although the reciprocating stroke of the coulier mechanism including the friction rod II is constant, the strokes of the carriers vary depending upon the extent of fashioning done to the fabric. In view of this, provision is made in the form of narrowing heads (not shown) to change the position of the end stops 60, and thereby limit the travel of the rods 42, and consequently of the yarn carriers 40 and the friction box 50, to the width of fabric desired. Furthermore, to provide a sufiicient time interval between operative strokes of the yarn carriers 40 when feeding yarn for full width fabric so that the loop forming elements including the sinkers 36, dividers 31, and the needles and knockover-bits (not shown) may operate to knit the yarn into fabric, the extent of travel of the bracket 21, and consequently of the friction rod I6 and the connecting bar 26, is necessarily.

greater than the longest operative stroke of the yarn carriers 40, as a result of this an appreciable amount of slippage takes place between the friction rod II and the friction box 50 at the end of each reciprocating stroke of the couliering mechanism; the shorter the stroke of the carrier rods 02 the greater the extent of such slippage at the end of each stroke thereof. Short stroke operation of certain of the carriers, as, for instance those used when knitting the high heelreinformed areas and/or the heel tabs, further increases the extent of slippage between the triotion box and the friction rod.

It is this slippage or relative frictional movement between the friction rod I6 and the friction boxes II that results in the development of friction and the resultant heating of these cooperating members, the temperature of which must necessarily be kept within definite limits for proper operation of these frictionally engaged members.

To maintain the friction rod I6 at a substantially uniform temperature at all times, a temperature control medium such as a cooling fluid is desirably circulated therethrough.

This is effected in accordance with the present invention, by means of a self circulating closed system (Figs. 1, 2, 4, 5 and 6), which generally comprises a stationary reservoir I connected to the hollow friction rod I6 by stationary pipe connections I2 and I4, in turn supported on the back beam I3 by brackets I3 and II, respectively, and intermediate flexible conduits or hose connections l and I6. In this system, fluid 80 from the reservoir I0, Fig. 2 is circulated through the rod Ii to dissipate some of the heat generated between the friction box and rod to keep the temperature of the rod from'rising above a given point, and in this way maintain the apparatus in proper operating condition. The reservoir I0 is preferably secured to a bracket member 62 which is bolted to the back beam I 3 in the manner shown in Fig. 4. A valve arrangement 03 is provided in the line I4 to facilitate replenishing the fluid supply in the system. A check valve ll, shown in section in Figs. 5 and 6, is provided to control the direction of flow of the fluid through the system; said valve including a manual control in the form of a handwheel II.

with the rocker arm 20 and the fr ction rod I. at the left end of their operativestrokes (Fig. 5), as viewed from the rear of a full-fashioned knitting machine, see Fig. 1, upon movement of the mechanism toward the right end of its operative stroke shown in Fig. 6, the fluid 00 within the rod is carried therewith, as the flexible conduits or hose connections I5 and I6 bend to permit such action; there being no circulation of the fluid in the system during this part of the cycle. However, as-the speed of the friction rod into the rod I6 to replenish the fluid displaced therefrom.

During the leftward or return stroke of the through the rod, is again carried therewith, but

in this instance in a leftward direction toward the position shown in Fig, 5. A the friction rod approaches the end of its leftward stroke and the velocity thereof is reduced, displacement of the fluid relative to the rod in the direction of travel of the latter is prevented by the action of the check valve 04 which automatically closes, as in Fig! 5, as soon as the pressure thereon is reversed by the fluid tending to force its way therethrough from left to right as viewed in Fig. 5. However, upon return of the friction rod I6 from the position of Fig. 5 to that of Fig. 6, the above action is repeated as the check valve opens and the circulation of fluid 80 is again resumed in the manner previously related; such repeated action accordingly producing a pulsating ourrent or flow of fluid through the friction rod and.

In the modification of the invention shown in Figs. 7 and 8, a reservoir 90 is supported by a bracket 92 which is adjustabiy mounted on an upright post 93 secured to a gallow member 54. In this arrangement fluid from the reservoir enters the friction rod I6 through a vertical tube 8!, horizontal pipe 96, check valve 91 and flexible conduit 08; whereas the fluid displaced from the rod I6 passes through a flexible conduit I02, check valve I03, lower horizontal pipe I04, vertical tube I05, upper horizontal tube I06, and thence through the gooseneck tube I01 into the reservoir 90. The operation of this arrangement is similar to that previously explained in connection with the apparatus shown in Figs. 1 to 6, and is diagrammatically illustrated in Figs. 14-18. In this arrangement fluid may be added to the system by removing lid I08 from the reservoir I6 is reduced when it approaches the end of its rightward travel, the fluid 00 therein, due to the inertia received during the full speed travel of and filling the reservoir to thelevel desired, thereby eliminating the need of the valve 83 used in the system shown in Figs. 1 to 6. A sec- .ond check valve I03, as shown in Fig. 7, has

been included in this arrangement for the purposeof supplementing the action of valve 91 and to' increase the overall efliciency of the system.

The reservoir arrangement shown in Figs, 9 and 10 comprises a standpipe member IIO having bosses II! and H3 for connecting it in the system. Lug portions III and H5 extending from one side of the standpipe IIO are provided for supporting a glass tube II6 which serves as a gauge to indicate the level of the fluid within the member H0. The tube H6 is held in position by a cap member H9 threaded into the lug II4, whereas washers III; and H8 are provided at opposite ends of the tube to seal the tube against leakage} of fluid therefrom. A duct I20 is provided intermediate the tube H6 and the standpipe member IIO to permit fluid to enter and rise to the same level in both members,

whereas openings plugged by screws I22 and I23 7 are included to facilitate the construction and cleaning of the arrangement. A plug I24 is threaded into the upper end of the standpipe member IIO to permit fluid to be added to the system, whereas an opening I25 therein, and a similar opening I26 in the cap member II9, are provided to expose both columns of fluid to the action of the surrounding atmosphere.

The reservoir I30 shown in Fig. 11 differs from that shown in Figs. 7 and 8 in that a siphon I32 is provided to feed fluid from the reservoir into the system by a siphon action instead of by gravity feed, whereas a straight pipe I33 is used to return the fluid from the system to the reservoir instead of a bent tube as in the previously described reservoir 90. By means of this arrangement the fluid is siphoned into the system from the reservoir at a point below the surface of the liquid and above the bottom'of the tank so that any scum on the surface of the fluid or any sediment which ma have collected at the bottom of the tank will not be circulated through the system. A plug I34 is threaded into the bottom of this tank to facilitate the cleaning thereof.

In order to prevent buckling or collapsing of the flexible conduits or hose connections 98 and I02, Fig. 7,'a coil spring I40 is preferably placed inside thereof as shown in Fig. 12.. The spring is held against axial displacement by the pipe connections at opposite ends thereof in the manner illustrated, this arrangement permitting bending-of the conduit while preventing it from collapsing or buckling.

The check valves 91 and I03 used in a device constructed in accordance with the present invention are preferably of the type shown in section in Fig. 13. This valve 91 comprises a dual chamber arrangement in which fluid admitted through the connection I4I enters a chamber I42, lifts the valve element I44 from its seat I45 and passes into the chamber I43 from which it discharges through the pipe connection I46 and circulates through the system. Upon flow of fluid through the system in the direction indicated by the arrows, the valve element I44 as it is lifted from its seat I45 is guided in such movement by an upper cylindrical extension I41 thereof which is slidable in a complementary shaped portion I48 of the valve casing. The valve 91 is shown in Fig. 13 in closed position, and consequently fluid cannot pass from chamber I43 to chamber I42, inasmuch as movement of fluid in that direction automaticall forces the valve element I44 down upon the valve seat I 45. The operation and function of the valve S'Iare similar to that of the check valve portion of the valve 84 shown in Figs. 1, 2, and 6. The various operative positions of a check valve during a complete reciprocating cycle of a full-fashioned knitting machine are diagrammatically shown in Figs. 14-18.

The manner in which a reciprocating ma- 1 chine member and a check valve cooperate to circulate a temperature control medium through the reciprocating member in accordance with the invention is diagrammatically shown in Figs.'

14-18 in connection with a circulating system comprising a reciprocating hollow rod I60, stationary pipe members I54 and I55 respectively serving as inlet and exhaust lines to a check valve I52, and flexible intermediate connectors I56 and I5'I. More specifically, these views show sequential steps in an operating cycle of a reciprocating friction rod of a full-fashioned knitting machine and the corresponding positions of a check valve element I50 of a check valve I52 in the fluid circulating system during these sequential steps, and the way in which the reciprocating rod I60 and the check valve I52.cooperate to circulate fluid I80 through the said rod.

When the friction rod I60 in its travel from right to left, as viewed from the rear of the machine, reaches the position shown in Fig. 14, the

I its stroke and reaches the' position indicated in Fig. 15, its velocity is decreased in the customary manner preparatory to reversing its direction of travel, whereas the fluid I60, by reason of its inertia received from the rod I60 while traveling at full speed, continues its full speed motion thereby lifting the ball I from its seat III (Fig. 15) as the fluid circulates through the system.

Circulation of the fluid through the system continues, as above set forth, when the friction rod I60 reaches the end of its leftward stroke indicated in Fig. 16, and also during part of its return stroke to the right as shown in Fig. 17; the action of the liquid during such circulation maintaining the ball element in floating position above the valve seat I in the manner indicated.

This return motion of the friction rod I from left to right while the fluid I therein Is flowing in the opposite direction, gradually reduces the flow velocity of the fluid until all of the inertia which it received from the friction rod during its previous travel from right to left, has been spent. Consequently, by the time the friction rod I60 has reached the end of its rightward stroke, which position is indicated in Fig. 18, the circulation of the fluid in the system has stopped, and although that fluid which is contained within the rod itself has meanwhile reversed its direction of movement, it being carried rightward by the rod I60 after its circulation has been stopped by the action of the oppositely moving friction rod, nevertheless, as the rod I80 approaches the end of its rightward stroke and its velocity is decreased preparatory to again reversing its direction of travel, the inertia of the fluid therein received from th rod during its rightward travel therewith although tending to displace the fluid relative to the rod, is prevented from so doing by the check valve I52 which is automatically closed by the fluid when the latter tends to circulate in a clockwise direction. Thus, the self operating check valve I52 automatically closes the system against circulation of the fluid in a clockwise direction, while permitting circulation in a counter-clockwise direction as viewed in Figs. 14-18; thereby controlling the direction of circulation of the temperature control medium through the reciprocating friction rod.

In a fluid circulating system constructed in accordance with this invention, the reciprocating motion of the member through which the cooling fluid is circulated provides the motive power needed to effect the desired circulation, said member being the sole flow inducing or fluid motivating element needed in the fluid circulating circuit, whereas a check valve in the system acts to control the direction of suchcirculation. It will be understood that in this arrangement the influx of fluid to the reciprocating rod balances the efliux therefrom, and that a full flow of fluid through the rod is consequently maintained at all times, thereby preventing air from entering the system and eliminating the decrease in the eiliciency of the system which would ocout if air were admitted. In an arrangement constructed in accordance with the present invention, any rise in the temperature of the fluid occasioned during its flow through the friction rod is dissipated between the time it leaves the rod and the time it reenters it by reason of the fact that the length of pipe through which it passes between repeated flow through the friction rod, acts as a cooling or radiator arrangement, as a result the fluid is always fed to the friction rod at a substantially constant temperature. The degree of cooling of the fluid may readily be increased by increasing the length or arrangement of the pipes through which it flows.

Obviously, an arrangement constructed in accordance with the present invention, may utilize suction, siphon action, gravity feed, or any other well known principle, or combination thereof, to feed fluid from the reservoir to the circulatin system. I

Although various fluids may be utilized as a temperature'control medium in apparatus of thistype, it has been found that water treatedwith an anti-rust solution is satisfactory for all practical purposes. Of course, the improvements shown andspeciflcally described by which I obtain the above resultscan be changed and/modified in various ways without departing-from the invention herein disclosed and hereinafter claimed. I

However, it is obvious from the foregoing that my invention can be applied to warming a reciprocating machine member as well as to cooling it. Further, it is to be understood that the words reciprocating and reciprocatively where appearing in the following claims are to be taken in a broad sense as including oscillating action as well as rectilinear reciprocation.

I claim: I Y

l. The method of circulating fluid through a temperature modifying closed circuit, said circuit including a hollow motion transmitting machine member which' forms a part only of the circuit, which consists in reciprocating said machine member and during said reciprocation preventing the flow of fluid in one direction and causing flow of said fluid through said circuit in the opposite direction solely by the inertia of the fluid itself caused by the reciprocating action of said member.

2. The method of circulating fluid through a temperature modifyingclosed circuit, said circuit including a hollow motion transmitting machine member which forms apart only of the circuit and flow restricting means, which consists in reciprocating said machine member to impart momentum of said fluid in one direction to circulate fluid through said circuit and checking the flow of the fluid in theopposite direction by said lation of temperature modifying fluid through a hollow reciprocating machine member of a straight knitting machine which consists in utilizing solely the inertia of the fluid asv exerted thereby in one direction to displace the fluid relative to the machine member during retardation of said member and its acceleration inthe opposite direction and preventing movement of the fluid relative to the machine member in the opposite direction.

5. The method of efiecting a pulsating circulation of fluid through a closed circuit cooling reverse flow of the fluid in said friction rod to control the direction of. flow of the fluid in said system. 1

6. A temperature modifying liquid circulating system for straight knitting machines comprising a hollow reciprocating member, a hollow stationary member, flexible conduits connecting the momentum to said fluid and utilizing solely the] culate said fluid always in one direction through a said circuit.

4. The method of effecting a pulsating circuends,of"'said reciprocating and stationary members in a closed circuit for the circulation of" liquid therethrough as activated by/said' hollow reciprocating member, and..check valve means for controlling the direction of flow of said liquid through said system, said circuit being free of association with any fluid motivating element other than said reciprocating member.

7. In a temperature modifying fluid circulating system forstraight knitting machines and the like, the combination comprising a hollow reciprocating member, a hollow stationary member, hollow. flexible connectors intermediate said reciprocating and stationary members for 'circulation of fluid through said reciprocating and stationary members in a closed circuit, and valve means in said system permitting flow of said fluid through said system in one direction only, said circuit being free of association with any fluid motivating element other than said reciprocating member.

8. In a temperature modifying fluid circulating system for straight knitting machines, the combination with a hollow reciprocating member, a hollow stationary'member and hollow flexible connectors intermediate said reciprocating and stationary members, of check valve means in said system for controlling the direction of flow of said fluid through said system as produced by the motion of said reciprocating member, said system being free of association with any fluid motivating element other than said reciprocating member.

9. In a flu d circulating system for full fashioned knitting machines and the like, the combination comprising a hollow reciprocating friction rod, a stationary reservoir, hollow connector means intermediate said rod and reservoir effecting a closed circuit, and self operating valve means for maintaining unidirectional circulation of said fluid through said system as produced by the movement of said reciprocating member, said circuit being free of any fluid motivating element other than said reciprocating friction rod.

10. In a fluid circulating system for full fashioned knitting machines and the like, the com bination comprising a hollow reciprocating friction rod, a stationary reservoir means, hollow friction rod.

11. In a closed circuit fluid circulating temperature modifying system for straight knitting machines and the like, the combination comprising hollow reciprocating and stationary members and connectors intermediate said members arranged for circulation of fluid through said system as produced by operation of said reciprocating member, and valve means associated with said stationary member for controlling the direction offlow of said fluid through said system, said system being free of association with any fluid motivating element other than said reciprocating member.

.12. In a closed circuit fluid circulating temperature modifying system for straight knittingmav.chines'and the like, the combination comprising a hollow reciprocating member, a hollow stationary member, hose connections intermediate said hollow members, fluid means in said system, and valve means associated with said stationary member for controlling the direction of flow through said system as activated by said reciprocating member, said system being free of association with any fluid motivating element other than said reciprocating member.

13. In a full fashioned knitting machine having a hollow friction rod and means for reciproeating said friction rod, of a reservoir in and connections forming a temperature modifying circuit with said rod having fluid therein and arranged to keep said rod fllled therewith, and valve means,in said circuit for controlling the direction of flow of said fluid through said circuit as effected by the reciprocation of said friction rod, said circuit being free of association with any fluid motivating element other than said hollow friction rod.

14. In a full fashioned knitting machine having a hollow friction rod and means for reciprocating said rod, of a reservoir and connections forming a temperature modifying closed circuit with said rod having fluid therein and arranged to keep said rod fllled therewith, valve means in said circuit arranged to control the direction of flow of fluid through said circuit as effected by the reciprocation of said rod, and siphon means for feeding fluid from said reservoir for circulating through said friction rod, said circuit being free of association with any fluid motivating element other than said hollow friction rod.

15. The combination with a hollow reciprocatively operated fluid motivating knitting machine member, of means connected with the ends of said hollow member establishing a temperature modifying closed fluid circuit therewith, fluid in said circuit, and a valve element connected in said circuit and arranged to be operated by the liquid in timed relation with the movements ing closed liquid of said knitting machine member, said circuit being free of association with any fluid flow inducing element other than said machine. member.

16. The combination with a hollow reciprocatively operated knitting machine member, of means connected with the ends of said hollow member establishing a temperature modifying closedfluid circuit therewith, fluid in said circuit, and a valve element connected in said circuit and arranged to cooperate with said knitting machine member so that it effects motivation of the liquid in said circuit, said circuit being free of association with any fluid flow inducing element other than said machine member.

17. The method of operating a machine having a hollow liquid containing motion translating member for causing a flow through stationary parts of a temperature modifying liquid circuit of which said motion translating member forms a portion, comprising periodically causing a flow in the liquid within said hollow member relatively thereto for a portion of its cycle of movement solely by momentum due to motion translating action thereof and preventing acornparable flow of the liquid relativelyto the hollow reciprocating member due to motion translating action thereof for another portion'of its cycle of movement to produce a net flowofiiquid through said member in a predetermined direction.

18. The combination with a reciprocatingdi quid motivating machine member having a liquid filled conduit associated therewith and imparting momentum to the liquid therein due to the reciprocation of the member, of means connecting the ends of said conduit with said 'mem bet and establishing a temperature modifying closed liquid filled circuit therewith, and a valve element connected in said circuit and arranged to be operated by the liquid in timed relation with the movements of said reciprocating machine member to check movement of liquid in one direction in said circuit due to saidmomentum and to permit movement of liquid in the other direction due to said momentum so that it induces flow of the liquid in one direction only in said circuit, said circuit being free of association with any fluid flow inducing element other than said machine member.

19. The combination with a reciprocating machine member having a liquid fllled conduit associated therewith and imparting momentum to the liquid therein due to the reciprocation of the member, of means connected with the ends of said conduit establishing a temperature modifyfllled circuit therewith and a valve element connected in said circuit and arranged to check movement of liquid in one direction in said circuit due to said momentum and to permit movement of liquid in the other direction due to said momentum so that it induces flow of the liquid in one direction only in said circuit, said circuit being free of association with any flow inducing element other than said machine member.

CHARLES S. ASCI-IENBRENNER; 

